Nut lock



T. R. WALKER Nov. 3 1925.

um LOCK I Filed April 4. 1925 Patented Nov. 3, 1925.

UNITED STATES TOM R. WALKER, OF ALEXANDRIA, LOUISIANA.

NUT LOCK.

Application filed April 4, 1925. Serial No. 20,684.

To all whom it may concern:

Be it known that I, TOM R. IVALKER, a citizen of the United States, residing at Alexandria, in the parish of Rapides and State of Louisiana, have invented a new and useful Nut Lock, of which the following is a specification. I

This invention aims to provide a nut lock wherein a key, which is slidable in a keyway in a bolt, is provided at one end with means for holding a nut against rotation with respect to the material through which the bolt passes, the key being provided at its opposite end with means for holding the nut against rotation.

It is within the province of the disclosure to improve generally ,and to enhance the utility of devices of that type to which the invention appert-ains.

Although a preferred form has been shown, a mechanic, working within the scope of what is claimed, may make changes, without departing from the spirit of the in vention.

In the accompanying drawings Figure 1 shows in side elevation, a device constructed in accordance with the invention; Figure 2 is a longitudinal section wherein parts are in elevation; Figure 3 is a cross section on the line 33 of Figure 2; Figure I} is a perspective view of the nut; Figure 5 is a perspective view of the looking device per se.

The numeral 1 marks a bolt. The bolt 1 has a longitudinal keyway 2. The threads of the bolt are shown at 3. A key 4: is slidable in the keyway 2. At one end, the key 4 has an arm 5. The arm 5 is secured rigidly to a ring 6. The ring 6 has some resiliency. On its inner side, the ring 6 has a pawl 7. At its opposite end, the key 4-. has an arm 8. The arm 8 tapers transversely as at 9. The numeral 10 denotes a resilient lock washer. The washer 10 has offset ends 11. The washer 10 is provided with an undercut recess 12. The recess 12 receives the arm 8 of the key 4. The washer 10 thus is removably assembled with the key 4. It is not necessary, however, that the connection between the washer 10 and the key 4 to detachable. The ring 6 and the washer 10 are coaxial. The complete locking device shown in. Figure 5 can slide freely over the threads 3 of the bolt 1 with the key 4 slidable in the keyway 2. The washer 10 may be replaced by any other means for locking a nut to the material through which the bolt 1 passes. A nut 14L is threaded on the bolt 1. The nut l i fits closely between the washer 10 and the ring 6. The nut 14 is provided on its outer surface with a ratchet 15. The pawl 7 cooperates with the ratchet 15.

hen the nut 14 is rotated directly, the pawl 7 can click over the ratchet 15. This is so because the ring 6 has some resiliency. The pawl 7 cooperates with the ratchet 15 to prevent reverse rotation of the nut 14. I Vhen the washer 10 is brought up against the material through which the bolt 1 passes, the nut 14 is coupled to the material. Then, the nut is held by a double lock, to wit, by the washer 10 and by the pawl and ratchet 715. If the operator wishes to hold the nut against rotation before the washer 1O abuts against the material, the pawl and ratchet mechanism 7 -15 will effect that end. As the nut is advanced along the bolt, the locking device of Figure 5 advances withthe nut. In order to loosen the nut, the ring 6 must be prized up a'little, to disengage the pawl 7 from the ratchet 15..

I claim In a nut look, a key, and washers mounted on the ends of the key and disposed in approximately parallel planes about at right angles to the length of the'key, one washer being of continuous annular form, and the other washer having its ends spaced apart, the space between the ends of the last-specified washer being so small that said washer is of substantially annular form, one washer having a pawl which projects toward the other washer, and a nut located between the washers and having a ratchet wherewith the pawl engages. I

In testimony that I claim the foregoing as my own, I have hereto affixed my signature.

TOM R. WALKER. 

